Front brakes:
Quick video how-to review: https://www.youtube.com/watch?v=PXwlYi6JYbQ .
Two types of brakes — 4.7 inch and 5.3 inch. Mine are 5.3. Either measure or look for casing code on caliper: Front Caliper Casting No. S13WE = 4.7 IN pad length; Front Caliper Casting No. 13WL = 5.3″ Pad Plate Length. The longer ones often have a 976 in the model number of the pads.
Keep the original springs handy. My last set of Raybestos pads had new springs that were about 1/4 inch too long and would not fit. Used original springs.